Research And Development Of The New Dynamic Of Explosive Materials, Cutting Temperature And Cutting Force Test System

Due to the asymmetry of explosive chemical material, there are many hard points scattered in its interior. During the cutting process, when the cutting tool hits the hard points, the heat generation will increase at the cutting edge of the tool and a sudden heat pulse will occur at this moment. If the maximum of the heat pulse exceeds a certain range, it may cause the work piece to explode. This paper presents a new temperature testing method to measure the cutting temperature dynamically by using semi-thermocouple technology. And the result can be used in power mills to help enhance the machining efficiency by choosing the most optimized cutting conditions.A great effort has been made to the following aspects: structure designing, machining and manufacture of the temperature sensor (including the jig designing and machining), static calibration, dynamical calibration, cold junction compensation and signal-adjustment box, software designing and integration, simulated cutting experiment and on-the-spot cutting experiment.After adopting phase-leading network, double-blade semi-thermocouple' s responding time will be less than 5 ms. It has a good sensitivity and very fast responding speed which can measure the temperature of the work piece accurately and quickly. The quantity measured will vary linearly with temperature. The error of the linear fit is less than 0.3% among the range of 0~ 620癈.The user' s software interface of the cutting temperature and cutting force system, which adopted the ActiveX technology, is succinct and maneuverable. Through the simulated cutting experiment and on-the-spot cutting experiment, the result presents that with respect to the explosive chemical material, the main factor, which affect the cutting temperature of the tool, is the depth of cut. Next is cutting speed. And the feed rate has little contribution to the rise of temperature.